Importance

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Abstract

An intermediary provides certificate information by receiving from a first other entity authenticated certificate information, processing at least a portion of the authenticated certificate information to obtain deduced information, if the deduced information is consistent with the authenticated certificate information, having a witness construct authenticated deduced information by authenticating at least one of: the deduced information, the deduced information together with date information, and the deduced information together with additional information, and by providing the authenticated deduced information. The date information may be at least one of: the current date and date information of the authenticated certificate information. The witness may do the processing. The witness may be the intermediary. The authenticated certificate information and/or the authenticated deduced information may include a digital signature, which may be relative to a verification key that is part of an issued certificate and/or may be computed by applying a one-way function to one or more secret values or by iterating a one-way function. The digital signature may keep the witness accountable for the fact that the authenticated deduced information is consistent with the authenticated certificate information.

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First Claim